The study reports the discovery of superconductivity in the iron arsenide compound (Ba1-xKx)Fe2As2, with a critical temperature (Tc) of 38 K. This material is doped by partially substituting barium with potassium, which introduces holes into the (FeAs)δ+ layers, suppressing the spin density wave (SDW) anomaly and inducing superconductivity. The parent compound BaFe2As2 exhibits a SDW anomaly at 40 K, while KFe2As2, with a similar structure, is a normal metal. The (Ba0.6K0.4)Fe2As2 sample shows a sharp resistive transition at 38 K, confirming superconductivity. The findings suggest that hole doping can be an effective pathway to achieve high-Tc superconductivity in oxygen-free compounds with the ThCr2Si2-type structure, potentially leading to higher Tc values in related compounds.The study reports the discovery of superconductivity in the iron arsenide compound (Ba1-xKx)Fe2As2, with a critical temperature (Tc) of 38 K. This material is doped by partially substituting barium with potassium, which introduces holes into the (FeAs)δ+ layers, suppressing the spin density wave (SDW) anomaly and inducing superconductivity. The parent compound BaFe2As2 exhibits a SDW anomaly at 40 K, while KFe2As2, with a similar structure, is a normal metal. The (Ba0.6K0.4)Fe2As2 sample shows a sharp resistive transition at 38 K, confirming superconductivity. The findings suggest that hole doping can be an effective pathway to achieve high-Tc superconductivity in oxygen-free compounds with the ThCr2Si2-type structure, potentially leading to higher Tc values in related compounds.